Source : Webster's Revised Unabridged Dictionary (1913)

Jawbone \Jaw"bone`\, n.
   The bone of either jaw; a maxilla or a mandible.

Source : WordNet®

jawbone
     n : the lower jawbone in vertebrates; it is hinged to open the
         mouth [syn: {lower jaw}, {mandible}, {mandibula}, {mandibular
         bone}, {submaxilla}, {lower jawbone}, {jowl}]
     v : talk idly or casually and in a friendly way [syn: {shmooze},
          {shmoose}, {schmooze}, {schmoose}]